Oberkulmer, the spelt parent, has a high level of resistance to Septoria nodorum leaf and glume blotch and poor resistance to leaf rust and powdery mildew. Forno, the wheat parent, is highly susceptible to S. nodorum, but has shown 'durable resistance' to leaf rust and medium resistance to powdery mildew.

Segregation data were analyzed with MAPMAKER using the Haldane mapping function with an initial LOD threshold of 10.0. Markers and linkage groups that were still unlinked (> 20 cM) were joined by lowering the LOD threshold to 3.0 and testing all possible combinations.